Coating process



Patented Aug. 23, 1927.

UNITED STATES- PATENT OFFICE.

OOA'IIN G PROCESS.

No Drawing. Application fled December 1, 1924, Serial No. 753,342, and in France December 15, 1923.

This invention relates to a process for giving any article, for instance of wood, of metal, of cardboard-or the like the appearance of enamel, porcelain, or natural or artificial stone.

This process consists essentially in dipping the article successively and in any suitable order, into baths of determined composition, the article being more or less dried between each dipping and receiving the colourings or powders which are intended to give it the desired appearance.

By the use of the .process according to the invention any object manufactured in the ordinary way from wood, metal, cardboard or from any other material can be given the appearance of enamel, mat, or polished, of all tints or colourings, with or without rainbow effects, varigated or irridescent' portions, the appearance of mother of pearl, of phosphorescence or of 0 a1.

The objects may also e given the appearance of plain porcelain, which may be doc-- orated, of majolica etc., or of burnt or fired or other earthenware or of faience or other artificial products.

Moreover, according to the process form ing the subject of the invention articles may be given the appearance of natural or artifical stone which may be veined or not, such as lapis-lazuli, or the appearance of resins, amber or the like. Finally the process may be employed for imitating silvered, guilded, bronzed and like surfaces or for giving spangled or diamond eifects by the addition of powders or metal spangles of all tints and colours, natural or artificial crystals, transparent powdered glass, which may be clear or mat, the crystal or. glass powder being coloured or not.

The process forming the subject of the in vention includes essentially the following stages or operations.

1. In the first place the article which may be of any material formed to its definite shape, is covered with a preliminary coating by meansof a paint brush or in any. other manner, this preliminary coating being" composed, in a known manner, from a mixture of linseed oil, turpentine and. crushed white lead. The article is now allowed to dry, and after drying there is applied in the same manner a second coat similar to the first, and the article is a ain dried.

2. The object 'is then dipped, into a bath certain amount of powder (bronze, silver,

composed of two and a half litres of water, 500 grammes of gelatine and 500 grammes of zinc white, this bath /'being heated in a jacketed pan and kept at a temperat-ureiof about 40 to 45 centigrade.

3. After slightly drying, the article is then dipped into a bathcomposed of two and a half litres of Water and'500 grammes of pure gelatine, kept at a temperature of about 40 to 45 centigrade to which colour is added (aniline .colour for instance) according to the tint of the foundation coat which may be desired, or the foundation coat may be white.

4. The article is then dipped into a bath similar to the preceding, but not coloured; this bath only being coloured in the case where it is desired to obtain a foundation coat of deeper shade than those obtained by dipping inthe preceding bath. The article is again dried. Where it is desired to obta n a polished appearance, the following opera tions' are also adopted.

'5. The object is dipped into a collodion bath and allowed to dry.

6. Finally it is dipped into a bath of varnish with a base of amyl acetate.

To give the object the appearance of porcelain or painted and decorated faience, the same operationsare carried through, but a thicker coating is applied in the bath containing gelatine and zinc white. Thejdipping in the bath of gelatine and colour is replaced by the application on the previous coating before it is completely dry,'of alcohol colours, this application may be made by means of a sponge, by a vaporizing apparatus or by means of a paint brush, allowin .the required decoration to be obtaine (points, dabs, arabesques or the like in one or more colours, which may be light or deep).

In the case in which it is desired to imitate natural or artificial stone, which may or may not be precious, between the dipping. into the bath of coloured gelatine and the dipping into the bath of pure. gelatine, there is applied on the surface of the article, whilst. still damp, 1 a sponge, slightly soaked in water and upon which has been shaken a wder, either a metallic 1d for example) or any coloured wder' fior instance owdered glass or p osphoreseent wder) or again spangles or WhlOh. may be coloured or not, the powder being chosen suitably according to the stone which it 1s desired to imitate.

Lastly, in cases where instead of giving to the article a polished surface, as described above, it is desired to give it a mat surface, for instance to imitate mat enamel with variegated effects, opal or mother of pearl, the operation described above under Nos/5 and t3 respectively are replaced by the followmg 2-- The article is dipped into a bath of collodion with a Cellulose acetate base, andafter drying powder is applied for producing the desired variegated effect, suchpowder being of any required description known in commerce. The powder is applied by means of a piece of buck skin and the object is finally dipped after this treatment into any known liquid for producing a variegated or iridescent efi'ect.

What we claim and desire to secure by pearance of enamel, including the following operations, the application to.the object of at least one preliminary coatin ,of linseed oil, turpentine and crushed white lead, the drying of the object, and the dipping of the said object into at least one bath composed substantially in the proportions of 2 litres of water, 500 grammes of gelatine and 500 grammes of zinc white, followed by the dry: ing of the object and the dipping thereof into a bath composed of about 2% litres of water and 500 grammes of pure gelatine, substantially as described.

2. A process for giving any object, of wood, metal, card or other material, the appearance of enamel, including the following operations, the application 'to the object of at least one preliminary coating of linseed oil, turpentine and crushed White lead, the.

drying of the object, the dipping of the said ,object into at least onebath composed subwood, metal, card or other material, the appearance of enamel, including the following operations, the application to the object of at least one preliminary coating of linseed oil,

turpentine and crushed white lead, the drying of the object, the dipping of the said object into at least one bath composed substantially in the proportions of 2 litres of water, 500 grammes of gelatine and 500 grammes of zinc white, drying the said object, dipping the said object into a bath composed of about 2 litres of water and 500 grammes of pure gelatine, dipping the object into a collodion bath, allowing the same to dry and finally dipping it into a bath of varnish with a base of amyl acetate.

wood, metal, card or other material, the appearance of enamel, including the following operations, the application to the object of at least one preliminary coating of linseed oil, turpentine and crushed white lead, the drying of the object, the dipping of the said object into at least one bat-h composed of gelatine zinc white mixed with Water,

4. A process for giving any object, of

drying the said object, dipping the said object into a bath'of pure gelatine dissolved in water, drying the said object and dip ping the same into'a varnishing bath with a base of amyl,,acetate, .substantially as described.

In witness whereof we have hereunto affixed our signatures.

ALFRED EGGIMAN. ALBINO PEREA. 

